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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.lib;
21  
22  import java.io.IOException;
23  
24  import javax.servlet.Filter;
25  import javax.servlet.FilterChain;
26  import javax.servlet.FilterConfig;
27  import javax.servlet.ServletException;
28  import javax.servlet.ServletRequest;
29  import javax.servlet.ServletResponse;
30  
31  /**
32   * A filter that does absolutely nothing. Can be used with the CompoundFilter.
33   * 
34   * @since 1.1
35   */
36  public final class _NullFilter implements Filter
37  {
38      public void init(FilterConfig filterConfig) throws ServletException
39      {
40      }
41  
42      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
43          final FilterChain filterChain) throws IOException, ServletException
44      {
45          filterChain.doFilter(servletRequest, servletResponse);
46      }
47  
48      public void destroy()
49      {
50      }
51  }